Choosing Low- and No-Calorie Sweeteners: Dietary Guidance, Sensory, Health, and Safety Considerations

Another sweetener review, but this one earns a read

Food formulators don’t need more sweetener options. They need clearer reasons to pick one. A 2025 paper in Nutrients (DOI: 10.3390/nu17050793) does exactly that. It connects dietary guidance, sensory performance, metabolic impact, and safety limits. The authors focus on what makes a sweetener commercially viable, not just sweet.

Background

Public health and policy organizations are pushing for sugar reduction. Consumers are paying more attention to what they eat. That puts real reformulation pressure on every food category. But replacing sugar is not a one-to-one swap. Each sweetener has a different sweetness level, calorie load, digestive tolerance, and functional profile. This paper gathers those factors in one place.

What the paper did

The authors mapped low- and no-calorie sweetener options against current dietary guidance and safety evidence. They focused on practical selection factors. Those include sensory quality, energy contribution, metabolic pathways, heat stability, and tolerable intake. It is a decision-support resource, not another ingredient list.

Key findings

The paper highlights two commercially viable rare sugars: D-allulose and D-tagatose. Allulose is about 70% as sweet as sucrose and supplies roughly 0.4 kcal/g. Tagatose is much closer to sugar on the sweetness scale, at around 92%, but still lower in calories. It delivers about 1.5 kcal/g.

Allulose stands out for specific reasons. Its metabolic extent is very low. It does not raise blood glucose. It also has good thermal stability. That makes it useful in cooking and baking, where heat can destroy other sweeteners.

Sugar alcohols remain a workhorse option, but they come with limits. Erythritol, mannitol, sorbitol, glucitol, and xylitol occur naturally in fruits and vegetables. They also carry clear intake restrictions. Exceed those limits, and you risk laxative effects. That’s not a theoretical concern. It’s a formulation constraint.

Sweetener	Sweetness vs. sucrose	Energy	Key consideration
D-allulose	~70%	~0.4 kcal/g	Very low metabolism; no glycemic impact; heat-stable
D-tagatose	~92%	~1.5 kcal/g	Sugar-like sweetness at lower calories
Sugar alcohols (erythritol, mannitol, sorbitol, glucitol, xylitol)	Varies	Varies	Naturally occurring; explicit intake limits; excess causes laxative effects

What this means for formulators

The practical message is simple. Match the sweetener to the application, not to the hype.

For baked goods and cooked sauces, allulose fits well. Its heat stability holds up in the oven. The sweetness gap—70% compared with sugar—means you’ll likely need to adjust levels or blend with a high-intensity sweetener. For a sugar-like onset and mouthfeel, tagatose gets you closer. But at 1.5 kcal/g, it is not a zero-calorie solution.

For beverages and confections, sugar alcohols still have a role. Their digestive tolerance limits need to be part of your serving-size calculations. A small portion might be fine. A larger one might not be.

The paper also makes a useful distinction: “low-calorie” and “no-calorie” are not the same thing. Allulose has a measurable calorie value of 0.4 kcal/g, even though the body metabolizes very little of it. That matters for nutrition labeling and for buyers who need accurate calorie declarations.

FAQ

Can allulose be called zero-calorie? Not from a strict energy standpoint. The paper lists allulose at 0.4 kcal/g. That’s very low, but not zero.

Do sugar alcohols always cause digestive problems? No. They cause problems when intake exceeds established limits. The paper warns that overconsumption can have laxative effects, so portion control matters.

Is tagatose better than allulose for baking? The paper calls out allulose for its good thermal stability. Tagatose is sweeter and closer to sugar in taste, but allulose is the one highlighted for cooking and baking use.

The industry takeaway is straightforward. Read the label. Count the calories. Check the digestive limits. Understand the heat stability. Allulose, tagatose, and sugar alcohols all have a place. The formulators who win are the ones who choose the right sweetener for the right food system.